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In mathematics

256 is 4 raised to the 4th power, so in tetration notation 256 is 24.[1]

256 is a perfect square (162).

256 is the only 3-digit number that is zenzizenzizenzic. It is 2 to the 8th power or ((22)2)2{\displaystyle ((2^{2})^{2})^{2}}.

256 is the lowest number that is a product of eight prime factors.

In computing

One octet (in most cases one byte) is equal to eight bits and has 28 or 256 possible values, counting from 0 to 255. The number 256 often appears in computerapplications (especially on 8-bit systems) such as:

The number value in HebrewGematria of the word רָנּוּ (ronna) (meaning "sing"), which appears in Jeremiah 31:6, "Sing with gladness for Jacob," and was associated with a prophecy of the return of the Messiah in the Hebrew year 4856 (1095–1096), which was close to the 256th lunar cycle (each cycle lasting 19 years), when the Jews were persecuted during the First Crusade.[15]